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| Agilent 34410A firmware disassembly / rebuild |
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| palindrom71:
Hi, I just updated my Agilent 34410A firmware to the latest revision, which still require java to run over the web and its certificate ended in 2019. I was wondering if anyone tried to disassemble the original firmware and pack it up again (attached image). The file format is very interesting, it looks like there's a memory location for every 32b + checksum (didn't check yet) I wonder if there's any toolbox released (or leaked) for work with that. --- Code: ---%headerlength=9 %imagerev=2.43 %imagetype=instrumentimage %model=34410A %revsnotsupported=<0.13 %supportedio=lan,gpib,usb %updatedescription=34410A Digital Multimeter Firmware, Revision 2.43 %updatemethod=caspreRamBased %utilityrev=B.01.09 S50500035205A0 S30DFF800000D9B91711FFB52043A2 S315FF8000104800004148000045436F70797269676800 S315FF8000207420313938342D323030302057696E6440 S315FF8000302052697665722053797374656D732C20AF S315FF800040496E632E600000006000000060000000C3 S315FF80005039000002480000097C681B787C6000A696 S315FF8000605464045E548403DA608410007C80012427 (...) --- End code --- |
| coromonadalix:
there is another thread where i contributed and some people tried with me to hack a 34410a into a 34411a .... my meter has the serial port plug (idc10) mounted on the main board, was supposed to be an console port but i think i did the mistake to upgrade it i had 2.x fw version and i think the port was closed .. we tried to hack the updaters and the FW, no avail ... schematics float on the web ... and you'll see what i meant by internal serial port ... folowing board revisions had the connector removed good luck dont forget the L4411A who share the same design minus the front panel, 34410A 34411A L4411A are brothers minus the sampling speed who changed you had the v2.41 and 2.43 versions available at the time ... |
| zrq:
Check out my post: https://www.eevblog.com/forum/testgear/possible-upgrade-agilent-34410a-to-34411a/msg4454563/#msg4454563 Also I'm quite sure TheSteve is wrong about the 10A to 11A uphack according to my firmware analysis, the magic value check againest is in the flash (a different sector that the normal upgrade process will not touch) instead the EEPROM. But I got a L4411A instead and can make mistakes... |
| coromonadalix:
could be .... the trick is the have / possess 34410a 11a l4411a at the same time loll |
| TheSteve:
I 100% changed two 34410s to 34411s, however they were early versions. So maybe there was something slightly different about them. I wish I still had one to experiment with. |
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